Water heater controller



FIG. 1 is a perspective view of a water heater controller;

FIG. 2 is a front elevation view of the water heater controller of FIG. 1;

FIG. 3 is a right side view of the water heater controller of FIG. 1;

FIG. 4 is a left side view of the water heater controller of FIG. 1;

FIG. 5 is a top side view of the water heater controller of FIG. 1; and,

FIG. 6 is a bottom side view of the water heater controller of FIG. 1.

The portions illustrated in broken lines on the figures depict unclaimed environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a water heater controller, as shown and described. 